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. Author manuscript; available in PMC: 2023 Dec 1.
Published in final edited form as: Environ Int. 2023 Oct 14;181:108266. doi: 10.1016/j.envint.2023.108266

Table 1.

Descriptive characteristics of Medicare beneficiaries who were continuously enrolled in both Medicare Part A and Part B between 2004 and 2016 and had a 3-year period of free of lung cancer diagnoses following their enrollment in Medicare.

Variable Value
Cohort description
Total population 12,429,951 (100 %)
Total person-years 95,280,525
Number of events 166,860 (1.3 %)
Median follow-up (years) 7.7
Individual characteristics
Age at study entry (years) 71.5 ± 5.0
Sex
Men 5,070,128 (40.8 %)
Woman 7,359,823 (59.2 %)
Race
White 11,153,635 (89.7 %)
Black 690,780 (5.6 %)
Other 585,536 (4.7 %)
Ever enrolled in Medicaid
Yes 1,287,642 (10.4 %)
No 11,142,309 (89.6 %)